All games are a lot harder than they were four years ago, even the micros. There are a lot more regs mutli-tabling these, and even the bad players mostly aren't quite as bad. There are now endless training sites and videos available, and while most people who view those are still never going to be crushing the games, even the worst coach will still fix a couple of the biggest leaks that used to give regs some of their edge.
That said, if you're near the best then 40-50% is probably still attainable at these, but someone who can play them that well is probably moving up quite quickly. Sharkscope/OPR some of the better players and see what they're managing to get to give yourself an idea of what's currently achievable.
Note that Stars have said they will be changing the payouts by the end of this week, to 27 paid instead of 18, and it remains to be seen how moving the bubbles that will affect possible ROIs, but the best regs will always adapt the most quickly. Good luck if you decide to try them.
Bad players still make FTs though